Timer



Nov. 29, 1927.

L. E. SUNDSTROM TIMER Filed Aug. 10. 1926 A 'II// amoemtoz D aflovn $11 a Patented Nov. 29, 192;?"

iii

LEOJBIARD E316 SUHDSTROFI, O1?

i l i ELLE, I TEBRASLA.

TIMER.

Application August 10, 1 336.

i F lth the above an other oljects in view which will appear the escri ion proceeds, the invention res idea in t omb1naand in the details of construction her inafter described and claimed, it being understood that changes in the precise embodiment of the iuvention herein disclos d may be made within the scope of what is clain'ied, without dcparting from the spirit of the invention.

in the drawings Figure 1 shows in elevation, a device con structed in accordance with the inv ntion, a part being omitted, and the circuits being shown diagrammatically.

Figure 2 is a section of the device delineated in Figure l; and

Figure 3 is a fragmental elevation disclosing a slight modification.

The numeral 1 marks a portion of the frame of an internal combustion engine, the frame having a recess 2., The cam shaft ap pears at 3. The numeral 4 designates a timer casing extended into the recess 2, a spacing washer 5 being interposed between the rear end of the timer casing 4c and the frame 1, to receive the wear which occurs when the timer casing is rocked by the usual means (not shown), connected to a lip ti on the timer casing 4:.

The rim of the casing 4: has circumferentially spaced main terminals 7. The rim of the timer casing l carries auxiliary terminals 8 located near to the main terminals 7 but spaced far enough therefrom, so that a spark cannot jump between the terminals 7 and 8. The numeral 9 designates an arm, a conducting member 10 being mounted on one sine of the arm near to the outer end of the arm. Any suitable means may be supplied for mounting the arm 9 on the cam shaft 3. As shown, the cam shaft has a cross pin 11 received at its ends, in notches l1 formed in the end of a collar 14 which carries the arm 9, one end of the collar 1 being engaged by an abutment or on the cam tion and arrangen'ient of pa ts Serial 1:10. 128,413.

ing engaged by a nu if 3 thr irded on the cam shaft. The nut 12 is omitted in Figure 1.

The device above described may be used in a, variety of ways, and the circuits employcd will depend upon the taste and judgthe persons doing the wiring and in i By way of illustration, in Figure 1, there shown the primary winding 16 of a coil 1?. a switch 18 being interposed in the winding 16, and a source 19 of electricsl energy beinginterposed in the winding 16. The winding 16 may be grounded at its ends, shown at 20. The secondary winding of the coil 1? is denoted by the numeral and may be grounded at one end shown at (in the other end of the secondary winding 21, branches 23 lead to the main terminals '7. From the auxiliary terminals 53 conductors 24 lead to the spark plugs 25 the usual engine ground being designated by the numeral 26.

In practical operation, the high tension current enters by means of the branch 23 and passes into the main terminal 7. When the arm 9 moves around into the position shown in Figure 1, the current jumps from the main terminal 7 to the conducting member 10, and jumps from the con ducting member 10, to the auxiliary terminal 8, the current proceeding thence to the spark plug 25, by way of the conductor 24.

Figure 3, a slight modification is shown in the means whereby the arm is connected to the cam shaft. in Figure 3, the cam shaft is markel by the numeral 27 and. carries an abutment provided with ribs 29 received 'in grooves 30 on an arm 31 detachably mounted on the cam shaft 27, the arm 31 corresponding to the arm 9, and carrying a con ducting member 32, represented in Figure 1 by the conducting member 10. The arm 31 has ribs 33 received in grooves 34- formed in the rear surface of a washer 35 on the cam shaft 27 the washer 35 having seats 38 receiving the ends of the cross pin 36 in the cam shaft 527, a nut 37 being threaded on the cam shaft 52"? and serving to bind the Washer o5 the arm 31 together, the arm engaging the abutment 28.

iVhat is claimed is in a device of the class described, a casing, terminals carried by the casing and located in one plane ashaft supported for rotation, an arm movable in a plane parallel to and spaced from the plane in which the terminals shaft 3, and the outer end of the collar 14; beare located, the arm having a laterally set conducting member adapted to engage the terminals, an abutment on the shaft, :1 Washer on the shaft, the abutment having a rib, the washer having a groove, the (u-n1 being mounted on the shaft between the vzishei' and the abutment and having a groove receiving the rib of the abutment, the arm having a rib received in the groove of the Washer, the provision of a rib on both the abutment and the arm preventing :1 ve- 1 'vereei ot the arm and a consequent dispincement of the oonchioiii'lg member with respect to the terminais, and n'iemis "for holding the washer, the arm, and ti abutment, together.

In testimony that I claim the foregoing as 15 my oivm 1 have hereto affixed my signature.

LIL NAB-D ERIC SUNDSTROM. 

